Category Archives: Recycling of Biomass Ashes

Results

The mixture of MBM and BWA gave the highest barley yield (Table 3.5), which was significantly higher than for MBM alone. The barley yield of the MBM and different combinations of MBM and crushed rock was at the same level as for mineral NPK. All treatments with MBM or mineral NPK gave significantly higher yields of both barley and wheat […]

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Effect on Soil Physical Parameters

Depending on the amount, the type, the interval of application, and especially the characteristics of the soil, compost will improve soil structure and aggregate stability, hydraulic conductivity, infiltration, resilience against erosion, water hold­ing capacity, air balance, and soil temperature (Gerzabek et al. 1995; Hartmann 2003). Stabilization of soil aggregates by organic matter occurs in three main ways: (1) Application of […]

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Grate Furnaces

The grate furnace design is the most common in Sweden up to approximately 100 MW fuel, and the only one for capacities below 20 MW fuel (approximately 6 MW electricity)2. The ash has been through high temperatures, but not as high as in PF furnaces. The major part of the residues is bottom ash, and various fly ashes are a […]

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Recycling of Biomass Ashes: Current Technologies and Future Research Needs

Brigitte Amalia Knapp and Heribert Insam Abstract Biomass ash is a final by-product from biomass incineration and is being produced in increasing amounts. Ash contains a variety of macronutrients and micronutrients and thus requires an appropriate recycling strategy. This chapter addresses various recycling strategies and technologies, with a particular focus on a smart combination of wastes from different sources for […]

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Effects of Ash Applications on Soil Status, Nutrition, and Growth of Pinus radiata D. Don Plantations

Beatriz Omil, Federico Sanchez-Rodriguez, and Agustin Merino Abstract The aim of this study was to evaluate the effectiveness of multiple applications of biomass ash to acid soils. The study was carried out in two stands of Pinus radiata D. Don, aged 13 and 15 years, in the province of Lugo (northwest Spain). The soils in the stands were developed on […]

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Mineral Balance

To estimate the amount of nutrients needed for fertilization of the soil, an estimate of the nutrient balance is needed. The plant density and the climate are important (IFA 2008). Nutrient stocks have been restricted to the upper 30 cm, as most feeding roots of cacao are concentrated at that depth. Removal of nutrients from cacao ecosystems is caused by […]

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Recycling of Ashes for Geotechnical Constructions and Industrial Processes

Only high-quality ashes are suitable for the uses in agriculture and forestry explained in the previous sections. In particular for ashes that are characterised by elevated heavy metal contents, other uses are suggested, such as construction of roads, a surface layer in landfills, and as an additive in industrial processes such as concrete, brick, glass and cement production (van Alkemade […]

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Soil Acidity

Soil acidity can be considered as the capacity of soils to manifest properties of acids or proton donors (Vorob’eva and Avdon’kin 2006). It occurs when acidity-generating processes outweigh acidity-consuming processes (Ulrich 1994). A soil is defined as acid when its pH is lower than 7. Soil acidification has many causes that are natural and unnatural. Although soil acidification is a […]

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Reuse of Woody Biomass Fly Ash in Cement-Based Materials: Leaching Tests

Mario Berra, Giancarlo De Casa, Marcello Dell’Orso, Luigi Galeotti, Teresa Mangialardi, Antonio Evangelista Paolini, and Luigi Piga Abstract The feasibility of using woody biomass fly ash (WBFA) as a mineral admixture in cement-based materials was investigated. This fly ash was character­ized for chemical composition and used to prepare a cement blend with 70 wt% Portland cement and 30 wt% WBFA. […]

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Discussion

Different K sources combined with MBM gave an increased yield ofbarley compared with the use of MBM alone, whereas supply of K in addition to MBM did not significantly influence the yield of wheat. The soils used in this experiment had higher concentrations of readily available K than planned. The soils used in this experiment were within the group of […]

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